117,713 research outputs found
Introduction (a Chroniques vulciennes, I. De l'age d'or des fouille à la création du service de tutelle des monuments)
No full textIntroduzione al volum
‘Ritorno a Vulci’. New tools for the study of the south-eastern necropolises
No full textThe project ‘Ritorno a Vulci’ focuses on specific sectors of the south-eastern necropolis of Vulci, where excavations have been conducted since the 1800s. One of the primary objectives of this project is to create a dedicated WebGIS that will generate and manage new topographical documentation of the area. This will serve as a collaborative digital research platform, making document consultation more accessible and contributing to their preservation.
Another significant digital project is ‘Vulci nel Mondo’ (VNM), which is conceived as a Virtual Museum. The Authors illustrate this highly versatile tool as an online space to bring together a permanent collection on Vulci. The standard virtual tour model is built on two key aspects: navigation, providing access to the collections and other information on the museum’s website, and interaction, simulating a physical space with which visitors can engage
Introduction (a Chroniques vulciennes, 2. Histoires des fouilles, dispersions patrimoniales et horizons numériques)
No full textIntroduzione al volum
Chroniques Vulciennes, 2. Histoires de fouilles, dispersions patrimoniales et horizons numériques
No full textVulci tra scavo, dispersione, recupero, ricontestualizzazione, digital humanitie
Palladium-catalyzed Long-range Deconjugative Isomerization of Highly Substituted α,β-Unsaturated Carbonyl Compounds
No full textThe long-range deconjugative isomerization of a broad range of α,β-unsaturated amides, esters, and ketones by an in situ generated palladium hydride catalyst is described. This redox-economical process is triggered by a hydrometalation event and is thermodynamically driven by the refunctionalization of a primary or a secondary alcohol into an aldehyde or a ketone. Di-, tri-, and tetrasubstituted carbon–carbon double bonds react with similar efficiency; the system is tolerant toward a variety of functional groups, and olefin migration can be sustained over 30 carbon atoms. The refunctionalized products are usually isolated in good to excellent yield. Mechanistic investigations are in support of a chain-walking process consisting of repeated migratory insertions and β-H eliminations. The bidirectionality of the isomerization reaction was established by isotopic labeling experiments using a substrate with a double bond isolated from both terminal functions. The palladium hydride was also found to be directly involved in the product-forming tautomerization step. The ambiphilic character of the in situ generated [Pd–H] was demonstrated using isomeric trisubstituted α,β-unsaturated esters. Finally, the high levels of enantioselectivity obtained in the isomerization of a small set of α-substituted α,β-unsaturated ketones augur well for the successful development of an enantioselective version of this unconventional isomerization
Introduction (a Chroniques vulciennes, I. De l'age d'or des fouilles à la création du service de tutelle des monuments)
No full textIntroduzione al progetto sul patrimonio disperso e alle Cronache vulcent
Chroniques vulciennes, I. De l'age d'or des fouille à la création du service de tutelle des monuments
No full textCronache vulcent
Chroniques vulciennes, I. De l'age d'or des fouilles à la création du service de tutelle des monuments
No full textPatrimonio archeologico disperso di Vulc
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
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